Asymmetric Fitting Section for Keyboard Instrument Assembly
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Solution Overview
Problem
Existing electronic keyboard instruments have poor workability due to the difficulty in fitting the instrument main body with the stand, as the length between guide concave sections on the stand and the instrument main body are the same, making assembly challenging.
Innovation Solution
The keyboard instrument features a first fitting section on the instrument main body and a corresponding second fitting section on the stand, with the second fitting concave section having a larger rear vertical length than the front vertical length, allowing for easier insertion and improved assembly workability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the length between guide concave sections on the stand and the instrument main body are made the same, then the structure is simplified, but the assembling workability deteriorates
Solution Approach 1:
The patent applies local quality by creating an asymmetric fitting concave section where the rear side wall extends further than the front side wall. This local structural differentiation in the fitting section allows the instrument main body to be easily guided into position during assembly, while the rest of the structure maintains simplicity. The asymmetric design provides a self-aligning feature that improves assembling workability without requiring complex overall structural changes.
2Ease of operation
If chamfered portions are formed on the guide concave sections, then the insertion is facilitated, but the manufacturing complexity increases
Solution Approach 1:
Instead of adding chamfered portions to the front of the guide concave sections to facilitate insertion, the patent inverts the approach by extending the rear side wall beyond the front side wall. This creates a self-aligning asymmetric structure that guides the instrument main body into position naturally during assembly, eliminating the need for additional chamfered features and reducing manufacturing complexity while maintaining ease of insertion.
Data Source
AI summary
A keyboard instrument including an instrument main body having, on one side surface thereof, a first fitting section including a first fitting convex section, a first fitting concave section that is more concave than the first fitting convex section, and a first guide section provided therebetween, and a side plate which supports the one side surface of the instrument main body and has a second fitting section including a second fitting convex section corresponding to the first fitting concave section, a second fitting concave section corresponding to the first fitting convex section, and a second guide section provided therebetween so as to correspond to the first guide section, in which a vertical length of a rear side of the second fitting concave section in the side plate is larger than a vertical length of a front side of the second fitting concave section in the side plate.